PostgreSQL

The most advanced open source database in the world. Used by many corporate enterprises for a broad spectrum of application requirements. PostgreSQL is supported by a huge open source community and professional cunsultancies without the painfull and costly licencing fees taking ones arm and a leg.

PostgreSQL ranking

PgAdmin3 packages/downloads

PgAdmin3 GUI can be used to manage PostgreSQL database instances. For most operating systems a downloadable installer is provided. Other operating systems require installation via packages. Links lead to the latest versions I’ve tried to be fully functional.